/Engine/Plugins/Online/OnlineServicesEOS/Source/Public/Online/AuthEOS.h
virtual [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< [TFuture](API\Runtime\Core\Async\TFuture)< [FAccountId](API\Runtime\CoreOnline\Online\FAccountId) >[FOnlineAsyncOp](API\Plugins\OnlineServicesCommon\Online\FOnlineAsyncOp) &InAsyncOp, const EOS_ProductUserId &ProductUserId)> ResolveProductIdFn()